To add a bit of color to your man pages install the most pager. For most DEB based distros:

  $ sudo apt-get install most

For most RPM based distros:

  $ yum install most

Failing these, get the source here.

Now set the pager used by man and try running man:

  $ export MANPAGER="/usr/bin/most -s
  # or export MANPAGER="/usr/local/bin/most -s"
  $ man bash

Add the setting of MANPAGER to your shell ~/.profile to make the setting available when you login.